Adhesive material



106. uuwlrum I \uHo,

COATING OR PLASTIC.

UNITED STATES JOHN J. HARRIS, OF CHICAGO, ILLINOIS.

ADHESIVE MATERIAL.

No Drawing.

To all whom if may concern:

Be it known that I, JOHN J. HARRIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Adhesive Materials, of which the following is a specification.

This invention relates to improvements in adhesive materials and more particularly to highly adhesive pastes and liquid adhesives adapted for use as mounting pastes, s fl stitutes for glue and the like.

marrying out this invention. I employ a I. mineral commonly designated as and as a native colloidal clav. 1S material, although common y resignated as a clay, differs markedly from true clays, its particularly characteristic feature being its property of absorbing water and swelling up by reason of such absor tion, frequently to several times its origina volt is very readily suspended in water mu. in sns 391l- In accordance with the present invention,

{an amylageous or yummy adhesive base maerial 1S intimate y mixed wit 1 3mm 1n varying proportions, say from I. to 6 parts of the bentonite to each part of the adhesive base material, which i be, for example. AU ta ioca starchfio'tato starclipor the like. I incorporae wr -1e mix ure of adhesive material and bent-onite guitahleproportions of water say from five to fifteen times by weight the amount of the mixed adhesive material and bentonite. The mixture is then cooked to form a paste.

riior to cooking the mixture. I incorporate thereinto from one half to ten per centof the 40% sodium si|jcate sohfi'gp. which I have foun very remar a y lncrease the adhesive properties and permanence of the mixture. I may also incorporate small amounts of sultable reservativ s such as carbolie acid. vmo or mlx ur ma amounts 0 an it mater'a 1 whiting. may be added to lmpart a de- Application filed June 23, 1923.

v i .t t W I a PATENT o riea.

Serial 1V0. 647,380.

sired color to the paste and it has also been found that additions of small ro ortions, say one quarter to two per cent, of "lvcerine, er sul )hate Zinc sul )hate or mixtures a 1 procucing permanent and effective pastes.

As a specific example of an adhesive material made in accordance with my invention, I may employ, for example, equal parts by weight of ta ioc stare and hen tonite, together wlt 1 appro xi'iiiately 7811 times their combined weight of water, In preparing the paste there is incorporated approximately three-fourths as much by weight of a 40% sodiqn; silicate. s, glptimi as of the bentonite. pproximate y /c of whitin and small proportions, u) to 2% of -lvcerine and u hale and zinc su iatc mav also )e lncor- )o1a g n s 1a) henol or 't 1 min] or bo 1 ejddgd. ln 7 my prior application, Serial No. 592,495. I have pointed out that the adhesive base materials, such as the starches, and bentonite mutually interact upon each other in forming adhesives. I have now further discovered that bentonite and sodium silicate appear to inddifv e'ac h other in produo Tag an adhesive effect; for example, I have found that an adhesive having the strength of a- 30% sodium silicate solution may be produced by incorporating 25% of a 30% sodium silicate solution and 10% of bentonite in water. I have further found that the' presence of the three constituents, the adhesive base material such as starch, the bentonite and the sodium siliite in the paste, results in a further marked differentiation of the product and greatly improves its adhesive properties.

It is readily apparent that the materials employed in connection with the present invention mav be mixed drv. in order to be prepare 3'" e user. 1r hermore, I may use drv silicate sgdasolutions of other concenra ions tian iose above named in proper proportions, as is readily apparent.

I claim: 1. An adhesive material comprising silicate of soda and bentonite.

in suspension in about 10 times their com- 10 bined weight of water and 1 to 10% of silicate of soda (40% solution).

5. An adhesive material comprising silicate of soda, amylaceous matter and bentonite in suspension in water and small proportions of zinc and copper sulfates.

J OHN J. HARRIS.

. man -.mn. i 

